Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 3500 HD and 2014 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete. The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals and correct pin tension.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (W521) CLUSTER DIMMER SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the VSIM C3 harness connector.
3. Measure the resistance of the (W521) Cluster Dimmer Switch circuit between ground and the VSIM C3 harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Using the wiring diagrams as a guide, repair the (W521) Cluster Dimmer Switch circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the VSIM in accordance with the Service Information. Refer to MODULE, VEHICLE SYSTEM INTERFACE, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .